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I LATCH CASE.

No. 321,856'. Patented July 7. 1885.

Z ab L? Z192. ab u U UNITED STATES PATENT OEEICEo HENRY B. SARGENT, OF NEW HAVEN, CONNECTICUT, ASSIGNOR T O SARGENT t CO., OF SAME PLACE.

LATCH-CAS E.

SPECIFICATION forming part of Letters Patent No. 321,856, dated July 7, 1885.

Application filed May 4, 1885.

.T0 all whom, it may concern:

Beit known that I, HENRY B. SERGENT, or" New Haven, in the county of New Haven and State of Connecticut, have invented a new Improvement in Knob-Latch Cases; and I do hereby declarethe following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure l, a side view of one side of the case; Fig. 2, the reverse side; Fig. 3, a top view of the case, showing it as applied to the door for the purpose of indicating the openings; Fig. 4, a modification.

This invention relates to an improvement in knob-latch cases, such as are introduced into the stile of the door, commonly called niortise-latches.7 In applying such latches to the stile it is necessary for the joiner to cut holes through the stile for the knob and for the key-hole with a considerable degree of precision. The more common method of ascertaining the position for these holes is to place the case upon the surface of the stile, with the faceplate of the latch iiush with the edge of the door, and then with a pointed instrument mark upon the stile through the hub and through the key-hole; but in doing this there is considerable difficulty and a lack of the necessary precision. To overcome this difficulty, templets have been provided, by which the position of these holes may be indicated. NVhile this accomplishes the object of precision, it is inconvenient, as a di'erent templet is required for different latches.

The object of my invention is to construct the latch-case so that it may be readily employed to indicate the position for the respective cuttings through the door-stile; and it consists in constructing one or both plates of the case with a projection from its surface, which may form a bearing against the edge of the stile, with other projections on the case in such relation to the iirst projections as will indicate the points where the cuttings are to be ina-de, as more fully hereinafter described.

A represents one side of a common mortiselatch case, and B the reverse side. Upon the (No model.)

side of the case, and in horizontal line centrally through the hub-opening, I form a proiection, a, at the rear edge of the case, and in central line with the key-hole I form a like projection, b. On the side of the case distant from the projections a b equal to the distance between the center of the respective openings and the face of the case I form several projections, d, preferably one near the upper edge and the other near the loweredge; or it may be a rib extending over the whole surface of the case, as indicated in broken lines, Fig. l.

The workman in applying the lock places the case upon the surface of the jamb of the door, as seen in Fig. 3, bringing the projection d against the edge of the jamb, and then with a suitable instrument marks upon the stile in line with the projections c and b, as indicated in Fig. 8, which gives him the precise point for the center of the respective openings. The projections a may be upon the surface of the'plate, as shown, or they may be a projection upon the edge of the case, as indi` cated in broken lines, Fig. 2; or, instead of a projection, they may be a slight groove in the edge of the case, as seen in Fig. 4, which will serve as a guide for the instrument in marking; or, instead of being projectionsv to indicate the point, so that an independent instrument-may be employed to mark those points, the projections a b may be pointed, as indicated in broken lines, Fig. 3, so that when the case is applied, as seen in Fig. 3, pressure upon the case near its rear edge will indent the door, corresponding to the projections a b, and thoseindentations will indicate the precise position for the openings to be cut through the stile. In case the points are to be used, it will be understood the relation of the projections d to those points is to be made accordingly. By this construction each lock is in itself a templet to locate the proper position for the cuttings in the stile. They need be very slight, not sufficient to interfere with the introduction of the latch into its mortise.

It will be understood that the invention is applicable to locks without latches, or latches without locks, and is therefore not to be confined to a case which combines both a lock and latch.

IOC

I claiming to thc distance from thc face-plate of the The herein-described improvement in iai-ch case to the center of the said opening, subnnd lock cases, consisting,` in thc case constantinllyns described.

stiucted with an indicating-point in a 1101i- HENRY B. SARGENT. 5 zonmi linc through the openings in the case, Vitliesscs:

combincd with a projection upon the side oi' PERCEY F. SMITH,

the casc distant from said point correspond- XVM. S. COOKE. 

